smith



W. A. SMITH.

ROCK DRILLING APPARATUS.

APPLICATION FILED DEC. 27. $915.

Patented Aug. 29, 1916 v 2 SHEETSSHEET I.

w. A .SMITH. ROCK DRILLING APPARATUS.

APPLICATION FILED DEC. 27.1915- I 1 1 96,042 Patemned Aug. 29, 1916.

' 2 SHEETS-SHEET 2- iiifjf 1:;- h

Z6 .1 f F f MANUFACTURING COMPANY, 01? DENVER, COLORADO, A CORPORATIQN(3 DELA- WARE.

ROCK-DRILLING APPARATUS.

Specification of Letters Patent.

Patented Aug. 29,

Application filed December 27, 1915. Serial No. 68,795.

of Colorado, have invented new and useful Improvements in Rock-DrillingApparatus, of which the following is a specification.

The present invention relates to drilling apparatus, and the primaryobject is to provide simple and efiective mechanism which can be readilyapplied to or detached from a drilling machine, said mechanism constituting means for effecting the complete and continuous rotation of thedrill bit.

The present invention is a form or modification of the structuredisclosed broadly in co-pending application, Serial No. 68,794, filedDecember 27, 1915.

In the accompanying drawings :-Figure 1 is a side elevation of drillingapparatus, showing the improved rotating mechanism applied thereto. Fig.2 is a cross sectional view of the same substantially on the line 22 ofFig. 1. Fig. 3 is a detail sectional. view on the line 33 of Fig. 2.Fig. 4 is a sectional view on the line 4% of Fig. 2.

Similar reference numerals designate corresponding parts in all thefigures of the drawings.

In the embodiment disclosed, the drilling apparatus, as shown, includesa drilling motor 5 having a chuck (S at one end to. receive a drill bit7 and hold the same against relative rotation, the motor being of thehammer type, and its assemblage being maintained by side bolts 8'.Feeding means for the motor consists of a cylinder 9 in which is locateda piston, a portion 10 of which projects from the upper end of saidcylinder, and is made fast to the motor by the side bolts 8, beingsecured to a head 11, through which said side bolts pass. The pistonmember 10 of the feed means is not only capable of reciprocation, but isrotatable in the cylinder 9, so that said pistonand the motor 5,together with the drill bit 7 can rotate as a unit, while the cylindermember remains stationary. Means for supplying motive fluid to the motorand feeding-means consists of a suitable hose line, a portion 12 ofwhich is shown in Fig. 1, this supply means being of any well known ordesired type.

. Means for rotating the apparatus consists shaft 23.

of the following devices: A sleeve .13 is employed that fits over thepiston 10, and is secured by the side bolts 8, which pass through ears14 formed on the upper end of said sleeve,'this sleeve being alsoprovided with an external worm gear 15, which is inclosed by a two partcasing 16, the being heldtogether by bolts 17. The casing 16 includes atransversely disposed tuouiar extension 18 having an enlargemeflt 19,forming -a rotary motor chamber, said extension terminating in a handlegrip- F20. Rotatably mounted within the chamber 19, is a motor,consisting of inter-meshing rotary toothed pistons 21 journaled in theenlargement 19, one of the pistons having an ere tended gudgeon 22 thatis located in the tubular portion of the extension 18, and hav ing aninterlocking connection'with a worm This worm shaft carries a worm 24that is in mesh with the worm gear 15. Motive fluid for the rotary motor'is'supplied from any suitable source, through a hose line connected toa nipple 26 that deiivers into the chamber 19, a suitable exhaust 27being provided for the rotary motor. The supply is controlled by athrottle valve located in thehose line lVith this construction, it willbe understood that when motive fluid is turned into the drillingparatus, the same is fed 'to its work and motor 5 is operated. All thatis necessary to effect the rotation of the drill bit is to admit motivefluid to the rotary motor and to hold said motor against revolving aboutthe drilling apparatus. This, it will be obvious, is done by holding thehandle p 20. With the rotary motor in operation, the shaft 23 of theworm 24 will be revi thereby rotating the worm gear 15, a1 asmuch asthis worm gear is fined to motor 5 and the piston 10, these two patogether with the drill bit '7, will. be c. pletcly and continuouslyrotated as longs-ts the motive fluid enters the rotary motor.

From the foregoing, it is thought that the constriuztion, operation andmany advantages of the herein described invention will be apparenttothosc skilled in the art, without further description, and it will beunderstood that various changes in the size, shape, proportion, andminor details of construction may be resorted to Without departing fromthe spirit of the invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. The combination with drilling apparatus, including a drilling motor,and telescoping and relatively rotatable feeding mem bers therefor, oneof which is connected to the motor, of means for completely rotating thedrilling motor and the feeding member connected thereto, and means forsupplying fluid under pressure to the drilling apparatus, said supplymeans permitting said rotation.

2. The combination with drilling apparatus, including a drilling motor,a feed cylinder, and a feed piston operating in the feed cylinder andfixed tothe drilling apparatus, oftmeans for completely rotating thefeed piston and motor bodily, and means for supplying fluid underpressure to the drilling apparatus, said supply means permitting saidrotation.

3. The combination with drilling apparatus, including a drilling motor,a feed cylinder, and a feed piston operating in the feed cylinder andfixed to the drilling motor, of means for completely rotating the feedpiston and motor bodily, and means connected to the feed cylinder forsupplying fluid under pressure to the drilling apparatus, said supplymeans permitting said rotation.

4. The combination with drilling apparatus, of means for bodily rotatingthe same, comprising a gear fixed to said apparatus, a rotary motor, anda Worm operated by the motor and meshing with the gear.

The combination with drilling apparatus, of means for bodily rotatingthe same,

comprising a gear fixed to said apparatus, and a rotary motor having ashaft disposed transversely to the drilling apparatus and geared to saidgear.

6. The combination with drilling apparatus, of means for bodily rotatingthe same, comprising a gear fixed to said apparatus, and a rotary motorgeared to the gear and having a handle for holding it against rotationabout the drilling apparatus.

7. The combination with drilling appara- .tus including a drillingmotor, of a gear tus, of telescoping feeding members therefor, a gearfixed with relation to one of said members, a transversely disposedcasing in which said member is rotatably mounted, and a rotary motormounted in the casing and having a worm meshing with the gear.

9. An attachment of the character set forth, comprisinga worm gear,means for 1 fixing the same against relative rotation to the motor ofdrilling apparatus, a casing extending transversely of the worm gear,and a rotary motor in the casing having a worm engaged With the wormgear.

i An attachment of the character set forth, comprising a sleeve havingan external worm gear and means for attaching the sleeve to a drillingapparatus, a casing surrounding the gear and including a handle grip,and a rotary motor located in the casing and including a shaft having aworm in mesh with the gear.

In testimony whereof I have hereunto my hand in presence of twosubscribing witnesses.

. WILLIAM A. SMITH. Witnesses JAMES B. ELMENDORF, JESSIE TURNER.

